I would like to have some feedbacks on CB,s used in SVC,s in steel companies. we had a CB failure(explosion) in a 2nd harmonic filter.(33 KV CB).we are recommended to use 72.5 kv CB,s for all 2nd ,3th ,4th and 5th harmonic filters.The questions are:1-Are CB,s rated 50 HZ suitable for switching...
I would like to have some feedbacks on CB,s used in SVC,s in steel companies. we had a CB failure(explosion) in a 2nd harmonic filter.(33 KV CB).we are recommended to use 72.5 kv CB,s for all 2nd ,3th ,4th and 5th harmonic filters.
The questions are:
1-Are CB,s rated 50 HZ suitable for switching...
we are invoved in designing ground grid for a 63/20 Kv sub.(area: 120*80 sqm).The fence can not be included within ground grid area.the outer ground wire is 1 m inside the fence. our reccomendation is to isolate the fence from the grid and earth it seperatly but our client wants to connect the...
Hi.
Although relay manufactuerers claim their distance relays are capable of protecting short lines ( less than 10 Km) effectively provided SIR is less than 30 .
It is also claimed that CVT transients have no major effect on the operation of relay.
Meanwhile most of electric design engineers and...
dear freinds.
There are some VT primary fuse burnt outs in the newly energized 24 Kv metal clad switchgear.there is no short circuit in vt secondary side.it mostly happens in the time of swiching of 132/20 KV transformers.Two 20 KV outgoing feeders supply 20KV overhead lines.
vt,s have 1/4 of...
